Using the Rhino3dm library in vvvv gamma and I noticed that to evaluate a surface it needs to create a normal vector.
The creation of a normal vector seems to fail for a sphere and parabola primitive. Many other types of surfaces like lofts, donuts or extrusions I have tried work flawlessly.
What is it about the sphere and parabola that could make it fail?
Evaluating all the test surfaces in Grasshopper works just fine.
My test objects:
surface_curves.3dm (1.3 MB)
Just for context and showing the power of other software environments for using rhino/GH stuff. Evaluating the donut 250.000 times in Grasshopper takes close to 2 seconds. The viewport is unusable since Rhino/Grasshopper does not instance their own helper geometries like points, planes, etc. (this should have been a no-brainer).
In vvvv the same donut with the same 250.000 points takes 1.2 seconds and rendering each point as a cube the viewport runs at 60fps. So currently the obvious downside is that it is very selective on which surfaces it evaluates and which it just fails on.